These three basic types of definitions of the true Church of Jesus Christ have been in common use in sacred theology since the days of the great Jesuit theologian and controversialist, Gregory of Valentia (d. 1603). And, according to Gregory of Valentia, the broadest type of definition of the Church, the one which applies to this society as it lives in Heaven, in Purgatory, and on earth, is the formula describing it as "the multitude of those who have been gathered together by the grace of God's calling into the true worship of God and into the true and God-given knowledge of God, whether that knowledge be obscure, as it is in the case of the knowledge of the faith, or clear and manifest, as it is in the case of the blessed."
There are, incidentally, certain standard definitions of the Church Triumphant, as distinct from the Church Suffering and the Church Militant. As St. Thomas Aquinas teaches "the Church, according to the status viae [the condition of those who are working towards the Beatific Vision, but who have not as yet actually arrived at it] is the congregation of the faithful (congregation fidelium). According to the status patriae, however [the condition of those who have already come to the homeland of heaven] it is the congregation of those who possess the Beatific Vision (congregation comprehendentium)." The Catechism of the Council of Trent, first published in 1566, defined the Church Triumphant as "the most glorious and happy assembly of the blessed spirits and of those who have overcome the world, the flesh, and the devil, and who enjoy eternal beatitude, free and safe from the troubles of this world." Both of these definitions obviously fit within the framework of the broadest type of definition of the Church enunciated by Gregory of Valentia.